The present work aims to examine the effect of collective-work approach on creativity for improving leadership qualities in an unstructured decision-making process especially in uncertainty of IT sections. Perusing related studies surrounding the current issue, it is realized managers can involve team setting policy in developing options stage of a non-programmed decision-making process since the secondary data indicate collective work can elevate creativity sources. Besides, creativity is considered as a moderator for reinforcing leadership attributes. While these qualities enhance leadership performance enabling managers to detect the optimum options when they encounter organizational chaos. Accordingly, a model of an unstructured decisionmaking process is hypothesized in which team-setting is considered as a predictor variable for increasing creativity sources which are recognized as moderators. Then, leadership qualities crenellated by creativity are recognized as a criterion variable for promoting leadership performance. So, the primary data are collected through 38-statements questionnaires involving collective work, creativity and leadership qualities from 86 IT managers in Pune-India being ready to approach collective work policy in their unstructured decision-making. Through correlation, regression analysis and Durbin-Watson test, it is found there is a positive relationship between the variables. The tests between-subjects effects and SEM show the predictor variables have significant interaction with the criterion variables. Besides, ANOVA illustrates there is a significant difference between the means of predictors of this study. It would be concluded team setting approach can enhance creativity to moderate the leadership qualities for an effective unstructured decision-making process.